Electrical-circuit breaker.



-c. AALBORG. N ELEGTRIGAL GIROUIT BREAKER:

APPLICATION IILED MAY 2, 19'08. 936,594 Patented Oct. 12 1909.

WITNESSES:

INVENTOR Nmlsrmis. mm. mmo vusnmmn. n a

CHRISTIAN AALBORG, 0F WILKINSBURG,

rnrmvtr OFFICE.

PENNSYLVANIA, SSIGNOR TO \NIES'IING- HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VANIA.

ELECTRICAL-CIRCUIT BREAKER.

Specification of Letters Patent. Patented Oct. 12, 1909,

, I Application filed May 2, 1905. Serial No. 314,854.

- To all whom it may concern:

a citiaen of the United States, and a resident Q offlvllkinsbur'g, in the county of Allegheny i and State of Pennsylvania, have invented a new and useful Improvement in Electrical- Circuit Breakers, of which the following is a specification.

My invention relates to electrical circuit breakers, and it has for its object to provide means whereby the pressure exerted between the stationary and movable contactmembers of a circuit breaker may be easily and read: 11y adjusted.

The single figure of the accompanying drawing is a view in side elevation of a circuit breaker that embodies my invention, certain portions thereof being broken away for the sake of clearness of illustration.

Mounted .'upon the face of a marble or other suitable slab 1 are circuit. terminal pieces 2 and 3, that are adapted tobeconn'ected, when the circuit breaker is closed, by means of a brush or. flexible switchmember 4 comprising a bundle of sheet metal. strips the ends of which are beveled. The brush 4 is clamped, by means of screws 5 and 6, between a plate 7 and an arm 8 that is pivoted at 9 in a bracket 10 withwhich the slab 1 is provided. The arm 8 is provided, onits edges, near its upper end, with lugs or ears 11 between which a triangular shaped bracket 12 is pivotally mounted upon a pin 13. The heads of the screws 5 and 6, by means of which the brush 4 is clamped between the plate 7 and the arm 8, engage the' ends of the bracket 12 and thus serve as a means for fixing and adjusting the position of the bracket 12 with reference to the arm 8.

One end of a link 14 is pivoted upon a pin 15 with whichthe bracket 12 is provided, and its other end is pivotally connected to I an operating lever 16 by means of a pin 17 that is mounted in the outer end of the bracket 10, the circuit-breaker being closed when the lever occupies the position shown Adjustment of the pressure exerted by the- It is deemed unnecessary to describe in l detail'the means here shown for retaining the circuit breaker in closed position and for automaticall trippin it. upon the occurrence of pre etermme electrical condil tions, because they constitute no part of the present invention andbecause other suitable means may be employed for the purpose. The structural details and arrangement i of the-parts of the c1rcu1t breaker that constitute the present invention ma be varied considerably from what I have here shown and described without altering the mode of operation thereof or departin materially from its spirit and I desire tiat all such modifications shall be included within its scope.

I claim as my invention:

1.- In a circuit-breaker, therombination with stationar circuit terminals, and a movable, fiexib e contact member to engage therewith, of a link and lever operating mechanism for the movable contact member, said mechanism comprising a bracket secured to said member and means for adjusting the angular relation between said bracket and said movable contact men'iber to efi'e'ctvariations in the pressure exerted between said member and the stationary circuit terminals.

2. In a circuitbreaker, the combination with stationary circuit terminals, and a movable, flexible contact member to engage therewith, of a bracket pivoted to the said member, means whereby the bracket may be adjusted and fixed in position with reference to the contact member, and operating means for the contact member, said means being pivotally connected to the bracket.

3. In a circuit-breaker, the combhmtiou with stationary circuit terminals, and a movable, flexible contact member to engage therewith, of an operating lever, a bracket having a middle poihtsupported upon said member, a link that connects the operating lever to said bracket, and means for angularly adjusting said bracket upon its point of support as a center.

In testimony whereof, I have hereunto subscribed my name this 30th day of Apri 1906.

CHRIS IAN AAL'BOIH l.

Witnesses A. G; CoRRAo, Bmxnr Hmns. 

